Reputation: 644
I have following table.
Table A:
ID ProductFK Quantity Price
------------------------------------------------
10 1 2 100
11 2 3 150
12 1 1 120
----------------------------------------------
I need select that repeat Rows N Time According to Quantity Column Value.
So I need following select result:
ID ProductFK Quantity Price
------------------------------------------------
10 1 1 100
10 1 1 100
11 2 1 150
11 2 1 150
11 2 1 150
12 1 1 120
Upvotes: 29
Views: 63526
Reputation: 41
considering this table called prep:
and by making use of the table(sequence())
function (available in trino)
you can make a temp table with n numbers, join <= that on your initial Quantity column
select 1 as new_quantity, action, user
from (
select *
from prep
) t1
left join (
select sequential_number
from table(sequence(1,1000))
) t2
on t2.sequential_number <= t1.quantity
if you need a range from 0 to n (as i did), then simply select the sequential_number column.
Upvotes: -1
Reputation: 1
The generate_series
keyword might be used:
Select ID,ProductFK,1 as Quantity, Price from TableA t cross join generate_series(1,t.Quantity);
Upvotes: 0
Reputation: 3087
You can use a simple JOIN
to get the desired result as below:
SELECT t1.*, t2.number + 1 RepeatNumber
FROM TableA t1
JOIN master.dbo.spt_values t2 ON t2.type = 'P' AND t2.number < t1.Quantity
The above query repeats each record by the specified number in Quantity
column.
Note for master.dbo.spt_values on type = 'P'
:
This table is used for getting a series of number which is hard-coded in it by
condition of type = 'P'
.
Upvotes: 46
Reputation: 16
CREATE TAblE #temp
(
T_Name VARCHAR(50),
T_Times BIGINT
)
INSERT INTO #temp(T_Name,T_Times) VALUES ('ASHISH',4)
INSERT INTO #temp(T_Name,T_Times) VALUES ('PANKAJ',3)
INSERT INTO #temp(T_Name,T_Times) VALUES ('RUPESH',2)
INSERT INTO #temp(T_Name,T_Times) VALUES ('MANISH',5)
SELECT t.T_Name ,t.T_Times FROM
(SELECT T_Name,T_Times,CAST(('<val>'+REPLICATE(T_Name+'</val><val>',T_Times-1)
+'</val>') AS XML )AS X FROM #temp)t CROSS APPLY t.X.nodes('/val')y(z)
drop table #temp
Upvotes: -4
Reputation: 46361
You could do that with a recursive CTE using UNION ALL
:
;WITH cte AS
(
SELECT * FROM Table1
UNION ALL
SELECT cte.[ID], cte.ProductFK, (cte.[Order] - 1) [Order], cte.Price
FROM cte INNER JOIN Table1 t
ON cte.[ID] = t.[ID]
WHERE cte.[Order] > 1
)
SELECT [ID], ProductFK, 1 [Order], Price
FROM cte
ORDER BY 1
Here's a working SQLFiddle.
Here's a longer explanation of this technique.
Since your input is too large for this recursion, you could use an auxillary table to have "many" dummy rows and then use SELECT TOP([Order])
for each input row (CROSS APPLY
):
;WITH E00(N) AS (SELECT 1 UNION ALL SELECT 1),
E02(N) AS (SELECT 1 FROM E00 a, E00 b),
E04(N) AS (SELECT 1 FROM E02 a, E02 b),
E08(N) AS (SELECT 1 FROM E04 a, E04 b),
E16(N) AS (SELECT 1 FROM E08 a, E08 b)
SELECT t.[ID], t.ProductFK, 1 [Order], t.Price
FROM Table1 t CROSS APPLY (
SELECT TOP(t.[Order]) N
FROM E16) ca
ORDER BY 1
(The auxillary table is borrowed from here, it allows up to 65536 rows per input row and can be extended if required)
Here's a working SQLFiddle.
Upvotes: 13